He was such __ good speaker that he held our attention every minute of __ three-hour lecture.
#11278
A
/; the
B
a; /
C
a; the
D
a; a
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 I ________ the main point of the speech and wrote a summary of it.
#13140
A
grasped
B
misunderstood
C
mastered
D
recognized
 These flowers should not be watered too ______, once _____. 
#12398
A
long; every other day
B
often; every fourth day
C
soon; every two days
D
frequently; each five days
She spent as much time as she could    .
#13487
A
to learn English
B
playing with her kid
C
study a new language
D
played basketball